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US 12,000,006 B2Granted
3D printable hard ferrous metallic alloys for powder bed fusion
AssigneeMacLean-Fogg Company
InventorsCharles D. Tuffile, Harald Lemke
Life of this patent
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Abstract
Alloy compositions for 3D metal printing procedures which provide metallic parts with high hardness, tensile strengths, yield strengths, and elongation. The alloys include Fe, Cr and Mo and at least three or more elements selected from C, Ni, Cu, Nb, Si and N. As built parts indicate a tensile strength of at least 1000 MPa, yield strength of at least 640 MPa, elongation of at least 3.0% and hardness (HV) of at least 375.
Claims20
A 3D printed metallic part comprising:
- one or more iron based metallic alloy layers including the elements C, Cr and Mo, wherein C is present at 0.1 wt. % to 0.35 wt. %, Cr is present at 10.0 wt. % to 19.0 wt. %, and Mo is present at 0.5 wt. % to 3.0 wt. %;
- and at least two elements from Ni, Cu, Nb, Si and N, wherein if present, Ni is present at 0 to 5.0 wt. %, if present, Cu is present at 0 to 5.0 wt. %, if present, Nb is present at 0 to 1.0 wt. %, if present, Si is present at 0 to 1.0 wt. %, and if present, N is present at 0 to 0.25 wt. %, and the balance of the alloy composition contains Fe;
- the layers each having thickness in the range of 2.0 microns to 200.0 microns;
- and the printed metallic part is an as-built part without post-heat treatment wherein the as-built part without post-heat treatment has tensile strength of at least 1000 MPa, a yield strength of at least 640 MPa, an elongation of at least 3.0%, and a hardness (HV) of at least 375.
1 more element
A 3D printed metallic part comprising:
- one or more layers of an iron based metallic alloy including the elements C, Cr and Mo, wherein C is present at 0.1 wt. % to 0.35 wt. %, Cr is present at 10.0 wt. % to 19.0 wt. %, and Mo is present at 0.5 wt. % to 3.0 wt. %;
- and at least two elements from Ni, Cu, Nb, Si and N, wherein if present, Ni is present at 0 to 5.0 wt. %, if present, Cu is present at 0 to 5.0 wt. %, if present, Nb is present at 0 to 1.0 wt. %, if present Si is present at 0 to 1.0 wt. %, if present, N is present at 0 to 0.25 wt. %, and the balance of the alloy composition contains Fe;
- the layers each having thickness in the range of 2.0 microns to 200.0 microns;
- and the printed metallic part is an as-built part wherein the as-built part, has a tensile strength of at least 1000 MPa, a yield strength of at least 640 MPa, an elongation of at least 3.0%, and a hardness (HV) of at least 400.
1 more element
Dependencies are inferred from the claim text.